Roles of the Retinotopic and Environmental Frames of Reference on Vection

Fujimoto, Kanon; Ashida, Hiroshi

doi:10.3389/frvir.2020.581920

Cited by 4 publications

(3 citation statements)

References 49 publications

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“…Furthermore, previous studies have demonstrated that optical flow in the LVF induces stronger vection than that in the upper visual field (UVF) [6,7,13]. Studies suggest the LVF has greater utility than the UVF, such as in the estimation of heading direction [14], spatial resolution [15], motion perception/sensitivity [16], and mismatch negativity to visual motion [17].…”

Section: Related Workmentioning

confidence: 99%

Dynamically Adjusted and Peripheral Visualization of Reverse Optical Flow for VR Sickness Reduction

Kim

2023

Electronics

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Sickness is a major obstacle in the wide adoption of virtual reality (VR). Providing low-resolution peripheral “countervection” visualization could mitigate VR sickness. Herein, we present an extension/improvement to this work, in which the reverse optical flow of the scene features is mixed in, and the extent of the periphery is dynamically adjusted simultaneously. We comparatively evaluated the effects of our extension versus the two notable sickness reduction techniques, (1) the original peripheral countervection flow using the simple stripe pattern (with a fixed field of view and peripheral extent) and (2) the dynamic field of view adjustment (with no added visualization). The experimental results indicated that the proposed extension exhibits competitive or better sickness reduction effects and less user-perceived content intrusion, distraction, and breaks in immersion/presence. Furthermore, we tested the comparative effect of visualizing the reverse optical flow only in the lower visual periphery, which further reduced the content intrusion and lowered the sense of immersion and presence. The test indicated that using just the low visual periphery could achieve a comparable level of sickness reduction with significantly less computational effort, makingit suitable for mobile applications.

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Section: Related Workmentioning

confidence: 99%

Dynamically Adjusted and Peripheral Visualization of Reverse Optical Flow for VR Sickness Reduction

Kim

2023

Electronics

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“…Although we requested participants to look deep into the virtual environment, it is difficult to ensure that gaze was constrained in depth without eye tracking. It is possible that eye movements may influence experiences of the virtual environment by modifying the pattern of retinal motion generated by optic flow (Kim and Khuu, 2014;Fujimoto and Ashida, 2020). Therefore, it would be advantageous to assess whether vestibular-mediated gaze holding in depth might also influence the effect of linear gain on perceived scene instability, presence and cybersickness.…”

Section: Potential Limitationsmentioning

confidence: 99%

Effects of Linear Visual-Vestibular Conflict on Presence, Perceived Scene Stability and Cybersickness in the Oculus Go and Oculus Quest

Kim

Palmisano

Luu

et al. 2021

Front. Virtual Real.

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Humans rely on multiple senses to perceive their self-motion in the real world. For example, a sideways linear head translation can be sensed either by lamellar optic flow of the visual scene projected on the retina of the eye or by stimulation of vestibular hair cell receptors found in the otolith macula of the inner ear. Mismatches in visual and vestibular information can induce cybersickness during head-mounted display (HMD) based virtual reality (VR). In this pilot study, participants were immersed in a virtual environment using two recent consumer-grade HMDs: the Oculus Go (3DOF angular only head tracking) and the Oculus Quest (6DOF angular and linear head tracking). On each trial they generated horizontal linear head oscillations along the interaural axis at a rate of 0.5 Hz. This head movement should generate greater sensory conflict when viewing the virtual environment on the Oculus Go (compared to the Quest) due to the absence of linear tracking. We found that perceived scene instability always increased with the degree of linear visual-vestibular conflict. However, cybersickness was not experienced by 7/14 participants, but was experienced by the remaining participants in at least one of the stereoscopic viewing conditions (six of whom also reported cybersickness in monoscopic viewing conditions). No statistical difference in spatial presence was found across conditions, suggesting that participants could tolerate considerable scene instability while retaining the feeling of being there in the virtual environment. Levels of perceived scene instability, spatial presence and cybersickness were found to be similar between the Oculus Go and the Oculus Quest with linear tracking disabled. The limited effect of linear coupling on cybersickness, compared with its strong effect on perceived scene instability, suggests that perceived scene instability may not always be associated with cybersickness. However, perceived scene instability does appear to provide explanatory power over the cybersickness observed in stereoscopic viewing conditions.

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“…This suggests weaker roll CV to be perceived when participants adopt an upright viewing position as compared to a supine position. A review of literature indicates that most behavioral studies on vection instructed their participants to observe visual stimulation only in upright positions (Kim and Khuu, 2014;Chen et al, 2016;Palmisano and Riecke, 2018;Keshavarz et al, 2019;Fujimoto and Ashida, 2020;Weech et al, 2020). Specifically, most past research on effects of velocity on CV only asked participants to adopt an upright viewing position (Brandt et al, 1973;Held et al, 1975;Ujike et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Visually Induced Roll Circular Vection: Do Effects of Stimulation Velocity Differ for Supine and Upright Participants?

Wang¹,

Du²,

Wei³

et al. 2021

Front. Virtual Real.

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Visually induced circular vection (CV) has been the subject of a wide range of functional brain and behavioral research. Participants in MRI or PET studies on CV were mostly in a supine viewing position, while participants in behavioral studies on CV were mostly in an upright viewing position. This study examines the effects of viewing positions (upright and supine) on roll CV reported by 16 participants while watching random dots (92 × 60 degrees field-of-view) rotating at different angular velocities (2, 4, 8, 16, 32, 64 deg/s) for 30 s. Viewing positions affected roll CV durations differently depending on the stimulation velocities. At slower velocities (2, 4, and 8 deg/s), participants exhibited significantly longer roll CV sensations when they were sitting in an upright position as opposed to lying in a supine position. The onset of roll CV was also significantly earlier with participants in an upright position despite similar roll CV intensities in both viewing positions. Significant two-way interactions between effects of viewing positions and dot rotating velocities for some conditions were noted. Consistency between current findings and the hypothesis predicting a weaker roll CV in upright positions based upon perceived gravity by the otolith organs is discussed.

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Roles of the Retinotopic and Environmental Frames of Reference on Vection

Cited by 4 publications

References 49 publications

Dynamically Adjusted and Peripheral Visualization of Reverse Optical Flow for VR Sickness Reduction

Dynamically Adjusted and Peripheral Visualization of Reverse Optical Flow for VR Sickness Reduction

Effects of Linear Visual-Vestibular Conflict on Presence, Perceived Scene Stability and Cybersickness in the Oculus Go and Oculus Quest

Visually Induced Roll Circular Vection: Do Effects of Stimulation Velocity Differ for Supine and Upright Participants?

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